Relay single channel
Relay single channel
Relay Single Channel Module
Control high-voltage appliances and devices safely with this single-channel relay module from The Tech Depot, Bengaluru. Ideal for Arduino, Raspberry Pi, and microcontroller-based switching projects. Fast shipping, 7-day warranty on manufacturing defects, and dedicated technical support.
Specifications
| Type | Single Channel Relay Module |
| Operating Voltage | 5V DC (control side) |
| Switching Capacity | 10A @ 250V AC / 10A @ 30V DC |
| Trigger Type | Active Low (with optocoupler isolation) |
| Relay Type | SPDT (Single Pole Double Throw) - NO, NC, COM terminals |
| Indicator | Onboard LED for relay status |
| Isolation | Optocoupler-isolated input for microcontroller protection |
| Mounting | PCB with screw-terminal outputs and header pin input |
| Dimensions | Approx. 50 x 26 x 18.5 mm |
| Compatibility | Arduino, Raspberry Pi, ESP32, ESP8266, STM32, PIC, and other 3.3V/5V MCUs |
| Origin | Original / Authentic |
| Warranty | 7-day warranty on manufacturing defects |
| Support | Email & WhatsApp 24/7 |
Key Features
- High-current switching: Handle loads up to 10A at 250V AC - control lights, fans, pumps, solenoids, and more
- Optocoupler isolation: Protects your microcontroller from high-voltage spikes and back-EMF
- SPDT output: Three screw terminals (NO, NC, COM) give you both normally-open and normally-closed configurations
- Status LED: Onboard indicator lights up when the relay is energized - easy visual debugging
- Simple 3-pin interface: VCC, GND, and Signal - plug directly into Arduino or breadboard headers
- Compact footprint: Small PCB size fits easily into enclosures and prototype builds
- Active-low trigger: Logic LOW activates the relay, compatible with most microcontroller GPIO outputs
Why Choose This Relay Module?
- 100% authentic module sourced from trusted, authorized suppliers
- Tested and verified before dispatch for reliable performance
- 1-5 day shipping, 7-8 day delivery across India from our Bengaluru warehouse
- Expert technical support to help you wire, code, and troubleshoot
- Beginner-friendly with extensive online documentation and community tutorials
- The Tech Depot screw terminals ensure secure, vibration-resistant high-voltage connections
How It Works
A relay is an electrically operated switch. When your microcontroller sends a LOW signal to the input pin, the onboard optocoupler triggers the relay coil, which mechanically flips an internal switch. This allows a low-power 5V logic signal to safely control high-power AC or DC loads - such as household appliances, motors, or lighting - while keeping the control circuit completely isolated from the power circuit.
The module provides three output terminals: COM (Common), NO (Normally Open - disconnected when relay is off, connected when on), and NC (Normally Closed - connected when relay is off, disconnected when on). Choose NO for devices you want to turn ON with the relay, or NC for devices that should stay ON by default and turn OFF when triggered.
Project Ideas
- Home Automation: Switch lights, fans, and appliances on/off remotely using Arduino, ESP32, or Raspberry Pi with Wi-Fi or Bluetooth control
- Smart Irrigation System: Automate a water pump or solenoid valve based on soil moisture sensor readings
- IoT Remote Switch: Pair with an ESP8266/ESP32 and Blynk or MQTT to control any appliance from your smartphone anywhere in the world
- Timed Appliance Controller: Use an RTC module to schedule appliances - automatic fish feeder, grow lights, or security lighting
- Temperature-Activated Fan: Connect a temperature sensor (DHT11/LM35) and trigger a cooling fan when temperature exceeds a threshold
- Door Lock System: Drive an electromagnetic lock or solenoid lock with RFID, keypad, or fingerprint authentication
- Motor Direction Control: Combine two relay modules to build an H-bridge for reversing DC motor direction
- Learning & Education: Perfect for students learning about digital outputs, transistor switching, electromagnetism, and embedded systems
Wiring Guide
| Relay Module Pin | Connects To |
| VCC | 5V on Arduino / MCU |
Frequently Asked Questions
When will I receive my order?
Products ship within 1-5 days from our Bengaluru warehouse. Delivery within 7-8 days to most locations across India.
Is technical support available?
Yes, 24/7 support via email and WhatsApp for setup, troubleshooting, and application guidance.
What is your return policy?
7-day returns on manufacturing defects only. Full refund or replacement. Not applicable for user damage or misuse.
Are bulk discounts available?
Yes, wholesale pricing on orders of 10+ units. Contact us via WhatsApp or email for a custom quote.
Buy Relay single channel Online in India
Purchase the Relay single channel online at The Tech Depot - India's most trusted electronics components store. We deliver across all major cities including Bengaluru, Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata, Ahmedabad, Jaipur, and Surat. Get the best price on Relay single channel with fast 1-5 day shipping from our Bengaluru warehouse. All products are 100% authentic, sourced from authorized distributors with 7-day warranty on manufacturing defects.
Looking to buy Relay single channel at the best price in India? The Tech Depot offers competitive pricing, bulk discounts for orders of 10+ units, and dedicated technical support via email and WhatsApp. Whether you are a hobbyist, student, or professional engineer, we have everything you need for your electronics projects.